SumToSizePROOF.FirstKept: def of bendtorch-core@0.1.0.0
Import: import bendtorch-core@0.1.0.0/src/autograd/sum_to_size_PROOF.bend as SumToSizePROOF
Lines 19-21 of bendtorch-core@0.1.0.0/src/autograd/sum_to_size_PROOF.bend: https://jend.leeeet.dev/read.txt?path=bendtorch-core@0.1.0.0/src/autograd/sum_to_size_PROOF.bend&start_line=19&end_line=21

import Base
import bendtorch-core@0.1.0.0/src/shape/core.bend as Shape
import bendtorch-core@0.1.0.0/src/tensor/core.bend as Core
import bendtorch-core@0.1.0.0/src/tensor/construction_LAWS.bend as ConstructionLaws

def FirstKept(-shape: Shape.Shape, -original: Core.Tensor<shape>, pair: Core.Tensor<shape> & Core.Tensor<shape>) -> Type:
  (@+index: U32 -> {ConstructionLaws.clone_first_checked(shape, pair, index) == Core.checked_observe(shape, original, index) : Maybe<&2, F32>}) &
    (@+index: U32 -> {ConstructionLaws.clone_first_model(shape, pair, index) == Core.observe(shape, original, index) : Maybe<&2, F32>})

Uses (10):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=F32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Pair
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/shape/core.bend&name=Shape
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/tensor/construction_LAWS.bend&name=clone_first_checked
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/tensor/construction_LAWS.bend&name=clone_first_model
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/tensor/core.bend&name=Tensor
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/tensor/core.bend&name=checked_observe
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/tensor/core.bend&name=observe